Air purifier



FIG. 1 is a top view of an air purifier.

FIG. 2 is a front view of the air purifier of FIG. 1.

FIG. 3 is a left side view of the air purifier of FIG. 1.

FIG. 4 is a right side view of the air purifier of FIG. 1.

FIG. 5 is a rear view of the air purifier of FIG. 1; and,

FIG. 6 is an elevated perspective view of the air purifier of FIG. 1.

The broken lines in the figures are for environmental purpose only and form no part of the claimed design. 

The ornamental design for air purifier, as shown and described. 